package site.jjqzplucky.common.advice;

import jakarta.servlet.http.HttpServlet;
import jakarta.servlet.http.HttpServletRequest;
import org.springframework.core.MethodParameter;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdvice;
import site.jjqzplucky.common.annotation.ResponseResult;
import site.jjqzplucky.common.result.Result;

@RestControllerAdvice
public class ResponseAdvice implements ResponseBodyAdvice<Object> {
    public static final String RESPONSE_RESULT_ANN = "RESPONSE-RESULT-ANN";
    @Override
    public boolean supports(MethodParameter returnType, Class<? extends HttpMessageConverter<?>> converterType) {
        ServletRequestAttributes sra = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes());
        assert sra != null;
        HttpServletRequest request = sra.getRequest();

        ResponseResult resultAnn = (ResponseResult) request.getAttribute(RESPONSE_RESULT_ANN);
        return resultAnn != null;
    }

    @Override
    public Object beforeBodyWrite(Object body, MethodParameter returnType, MediaType selectedContentType, Class<? extends HttpMessageConverter<?>> selectedConverterType, ServerHttpRequest request, ServerHttpResponse response) {
        if(body instanceof Result){
            return body;
        }
        return Result.success(body);
    }
}
